BMI Calculator
Body Mass Index — a quick screening tool that compares your weight to your height. Useful as a general reference, not a verdict on your health.
Your BMI
Normal weight
What BMI is actually good for
BMI is a screening tool, not a diagnosis. It tells you whether your weight is typical for your height — useful for quick population-level health screening, useless for figuring out whether you personally are healthy.
The standard categories are: under 18.5 (underweight), 18.5–24.9 (normal), 25–29.9 (overweight), 30+ (obese). These are population averages; individual health depends on muscle mass, body composition, genetics, and activity level.
Where BMI breaks down
Muscular people are usually flagged “overweight” or “obese” by BMI because muscle weighs more than fat for the same volume. A 200-lb lean athlete and a 200-lb sedentary office worker the same height will have the same BMI despite wildly different health profiles.
Better-than-BMI indicators: body composition scans (DEXA, bioelectrical impedance), waist-to-height ratio, resting blood pressure, and training performance. BMI is useful as one data point, not the final word.
Text START to +1 (512) 737-7110 and your Threwline coach builds targets from your stats, goal, and training — not just a single number.
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